Add load_metadata_json function

This function loads the metadata.json into a puppet variable. This enables a number of neat things such as:

* Which version of the module am I using? 2.x? 3.x?
* Which author of the module am I using? puppetlabs? example42?

1 files changed, 16 insertions, 0 deletions

diff --git a/lib/puppet/parser/functions/load_module_metadata.rb b/lib/puppet/parser/functions/load_module_metadata.rb
new file mode 100644
index 0000000..0664a23
--- /dev/null
+++ b/lib/puppet/parser/functions/load_module_metadata.rb
@@ -0,0 +1,16 @@
+module Puppet::Parser::Functions
+  newfunction(:load_module_metadata, :type => :rvalue, :doc => <<-EOT
+  EOT
+  ) do |args|
+    raise(Puppet::ParseError, "load_module_metadata(): Wrong number of arguments, expects one") unless args.size == 1
+    mod = args[0]
+    module_path = function_get_module_path([mod])
+    metadata_json = File.join(module_path, 'metadata.json')
+
+    raise(Puppet::ParseError, "load_module_metadata(): No metadata.json file for module #{mod}") unless File.exists?(metadata_json)
+
+    metadata = PSON.load(File.read(metadata_json))
+
+    return metadata
+  end
+end